Clamp



E. B. MORGAN July 5, 1938.

CLAMP Filed Jun 1, 1957 INVENTOR. Ervmg fforgan ATTORNEYS.

Patented July 5, 1938 UNITED STATES CLAMP Erving B. Morgan, Grand Rapids, Mich, assignor to American Seating Company, Grand Rapids, Mich., a corporation of New Jersey Application June 1, 1937, Serial No. 145,686

2 Claims.

The present invention relates to clamps and more particularly to clamps for maintaining a pair of telescopically slidable members in longitudinally adjusted position. The clamp of the instant invention is in the nature of an improvement or modification of the clamp shown in United States Letters Patent No. 2,039,973, issued May 5, 1936, on application filed by me December 22, 1933, Serial No. 703,634.

The primary objects of. the instant invention are to provide a clamp assembly of the general character above indicated which is particularly well adapted for use in maintaining a seat disposed forwardly of a school desk at a predetermined or adjusted height from the floor and/or in properly adjusted vertical relation to the desk; and, to provide such a clamp assembly which is convenient and efficient in service, which is readily adjustable in use, and which is economical in manufacture.

An illustrative embodiment of the invention is shown in the accompanying drawing, where- Figure 1 is a front elevational view of a base support for a vertically disposed tubular pedestal within which a chair or table top supporting column is longitudinally slidable and vertically adjustably maintained;

Figure 2 is an enlarged sectional view thereof on line 22 of Figure 1;

Figure 3 is a sectional View on line 3-3 of. Figure 2;

Figure 4 is a view of the base supported tubular pedestal, its telescopically slidable chair or table top supporting column and the clamp for maintaining the pedestal and column in longitudinally vertically adjusted position; and

Figure 5 is a perspective View of the clamp without its tightening bolt.

Referring then to the drawing wherein like parts of the structure shown are designated by the samenumerals in the several Views, a base support I!) of cast or stamped sheet metal and having oppositely disposed depending feet II, is provided with a vertically disposed tubular pedestal I2 secured thereto in any convenient conventional manner.

A supporting column I3 for supporting a chair or table top and here shown as of tubular metal stock is telescopically slidable within the tubular pedestal I2. The tubular pedestal is provided with a pair of spaced parallel slots I5, I6 transversely of its length, the slot I5 being in the form of. a recess adjacent the upper end of the tubular pedestal I2.

A bifurcated clamp, generally designated I6, embraces the tubular pedestal I2, its opposite legs II, I8 each being respectively provided with a pair of spaced laterally disposed inwardly turned ears I3, 20. The ears I9 which project laterally and inwardly toward each other are seated within the upper slot or recess I5 and bear against the outer wall of the chair or table top supporting column I3 whereas the ears 20 are seated within the lower slot I6 and engage the outer wall of the supporting column I3. v

Means for compressing the legs I'I, I8 of the clamp I6 toward each other for maintaining pedestal I2 and its telescoping column I3 in longitudinally vertically adjusted position comprises the threaded bolt 2I projected through the bolt receiving aperture 22 in the leg ll of the clamp and its internally screw threaded sleeve nut 23 projected through the receiving aperture 24 of the leg I8 of the clamp.

Tightening the sleeve nut 23 on its threaded bolt 2I causes the legs I'I; I8 of the clamp I6 to be drawn toward each other which in turn causes the pair of ears I9, 20 to more tightly engage the outer wall of. the column I3 whose opposite outer surface is thus caused to tensionally and frictionally engage the inner surface of the tubular pedestal I3.

It will thus be seen that the clamp assembly herein shown and described is particularly well adapted for use in maintaining a seat disposed forwardly of a school desk at a predetermined or adjusted height from the floor and/ or in properly adjusted vertical relation to the desk. This clamp assembly is convenient and efficientin service, is readily adjustable in use and is economical in manufacture and while but one specific embodiment of the invention has been herein shown and described, it will be understood that certain details of the construction shown may be altered or omitted without departing from the spirit of the invention as the same is defined by the following claims.

I claim:

1. In a device of the class described, a tubular member provided with a pair of spaced parallel slots disposed transversely of its length, a member telescopingly disposed within said tubular member, a bifurcated clamp embracing the tubular member and having one leg provided with spaced laterally disposed ears each seated within a slot and each adapted to engage the wall of said second member, and means for compressing the legs of the clamp toward each other for maintaining the wall of said member in frictional engagement with the inner wall of said tubular member to maintain said members in longitudinally adjusted position.

2. In a device of. the class described, a tubular member provided with a recess disposed transversely of its length adjacent one end thereof and with a slot disposed through its wall in spaced parallel relation to said recess, a member telescopingly disposed within said tubular member,

10 a bifurcated clamp embracing the tubular memher and having one leg provided with spaced laterally disposed ears respectively seated within said recess and within said slot adapted to engage the wall of said second member, and means for compressing the legs of the clamp toward each other for maintaining the wall of said member in frictional engagement with the inner wall of said tubular member to maintain said members in longitudinally adjusted position.

ERVING B. MORGAN. 

